FAQ
Required avro classes are missing
---------------------------------

Key: HDFS-534
URL: https://issues.apache.org/jira/browse/HDFS-534
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Tsz Wo (Nicholas), SZE


Some tests like TestDFSIO are failing:
{noformat}
java.lang.NoClassDefFoundError: org/apache/avro/io/DatumReader
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:837)
at org.apache.hadoop.io.serializer.SerializationFactory.add(SerializationFactory.java:66)
at org.apache.hadoop.io.serializer.SerializationFactory.(SequenceFile.java:916)
at org.apache.hadoop.io.SequenceFile$Writer.(SequenceFile.java:385)
at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:276)
at org.apache.hadoop.fs.TestDFSIO.createControlFile(TestDFSIO.java:134)
at org.apache.hadoop.fs.TestDFSIO.testIOs(TestDFSIO.java:114)
at org.apache.hadoop.fs.TestDFSIO.testIOs(TestDFSIO.java:99)
Caused by: java.lang.ClassNotFoundException: org.apache.avro.io.DatumReader
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
{noformat}

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postedAug 10, '09 at 7:08p
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